Gallocyanin dye and process of making same.



UNITED STATES P TENT curios.

CHARLES DE LA HARPE AND RUDOLF BUROKHARDT, OF BASEL, SWITZERLAND, ASSIGNORS TO THE FIRM or DYE SWITZERLAND.

WORKS FORMERLY L. DURAND, HUGUENIN & 00., OF BASEL,

Specification of Letters Patent.

Patented Sept. v15', 1908.

application filed Hay"28, 1908. Serialflo. 435,509.

To all whom it may concern:

Be it known that we, CHARLES DE LA nearly insoluble in water and scarce y soluuntil a sample of the reaction mass dissolves ble in alcohol with a green-blue coloration.-

For its technical employ it is advantageously transformed into a leucoderivative whose hydrochlorate is easily soluble in water and gives on chromium mordanted fibers vivid, pure, green-blue tints.

Example. In'an autoclave are introduced liters of alcohol, 30 kilograms of a gallocyanin derived from galls-mid, (for instance,

. of the product resulting from-the condense:

tion 0]. nitrosodiethylanilin with gallamid) and 5 kilograms dinitrob'enzene and to the mixture thus obtained are added, while'stirring, 100 liters of an alcoholic solution of ammonia. containing 15 kilograms ammonia. The autoclave is then closed and the reaction mass heated, while stirring, to 110130 C.

tive by its treatment in a known manner with a reducing agent. The leucoderivative thus obtained is in the form of its hydrochlorate easily soluble in water and gives on I chromium mordanted fibers vivid, pure green-blue tints. It dissolves in concentratedsulfuric acid to a red-brown solution;

What we claim is:

.1. The described rocess for the manufacture of a new gal ocyanin-dyestufi which consists in heating a gallocyanin derived from gallamid withammonia in presence oi an aromatic nitrohydrocarbon. I 2. The described process for the manufacture of a new gallocyanin-dyestufi, which consists in heating a gallocyanin derived from gallamid with ammonia in presence of an aromatic nitrohydrocarbon and in treating the condensation product thus obtained with a reducing agent.

3. The described rocess for the manufacture of a new gal ocyanin-dyestuif which consists in heating a gallocyanin derived from gallamid with ammonia in presence of dinitrobenzene.

4. The described process for the manufacture of a new gallocyanin-dyestuif which consists in heating a gallocyanin derived from gallamid with ammonia in presence of dinitrobenzene and in treating the condensation product thus obtained with a reducing agent.

5. As. a new product, the described gallocyanin dyestuli derived from. ammonia and a gallocyanin derived from gallamid, the said dyestufi giving on chromium mordanted fibers vivid, pure, green-blue tints and dissolving in concentrated sulfuric acid with a red-brown coloration. v i I 6. As a new article of manufacture the described gallocyanin dyestufl constituted by the hydrochlorate of the leuc oderivative of the condensation product of ammonia with a gallocyanin derived from gallamid, the said dyestufi being easily soluble in water, dissolving in concentrated sulfuric acid to a red-brown solution and giving on chromium mordanted fibers vivid, pure, green-blue tints.

In witness whereof we have hereunto signed our names this 18th day of May 1908, in the presence of two subscribing witnesses.

CHARLES DE LA HARP-E. RUDOLF BURCKHARDT. Witnesses:

GEO. Grrronn,

AMAND RITTER. 

